Tolerate slight difference in condition timestamps in tests

I just observed a test flake because there was a second difference
between the lastTransitionTime of a desired vs an actual status
condition. This should avoid that by tolerating up to three seconds of
difference.

I imagine other tests might be vulnerable to this flake too, but for now
I'll just address the one I encountered.

Signed-off-by: Nic Cope <nicc@rk0n.org>

internal/controller/apiextensions/composite/reconciler_test.go

@@ -19,8 +19,10 @@ package composite
 import (
 	"context"
 	"testing"
+	"time"
 
 	"github.com/google/go-cmp/cmp"
+	"github.com/google/go-cmp/cmp/cmpopts"
 	corev1 "k8s.io/api/core/v1"
 	kerrors "k8s.io/apimachinery/pkg/api/errors"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
@@ -704,7 +706,7 @@ func TestReconcile(t *testing.T) {
 			if diff := cmp.Diff(tc.want.err, err, test.EquateErrors()); diff != "" {
 				t.Errorf("\n%s\nr.Reconcile(...): -want error, +got error:\n%s", tc.reason, diff)
 			}
-			if diff := cmp.Diff(tc.want.r, got, test.EquateErrors()); diff != "" {
+			if diff := cmp.Diff(tc.want.r, got, test.EquateErrors(), cmpopts.EquateApproxTime(3*time.Second)); diff != "" {
 				t.Errorf("\n%s\nr.Reconcile(...): -want, +got:\n%s", tc.reason, diff)
 			}
 		})